How long do you have to stay inside after a nuclear bomb?
The walls of your home can block much of the harmful radiation. Because radioactive materials become weaker over time, staying inside for at least 24 hours can protect you and your family until it is safe to leave the area.
Stay inside for 24 hours unless local authorities provide other instructions.
It can be hard to gauge when it's safe to emerge from your shelter, but most estimates suggest a minimum stay of 24-hours, and a maximum stay of 14-days - enough time for the initial radiation to fall to (relatively) safe levels.
Radiation levels are extremely dangerous after a nuclear detonation but the levels reduce rapidly, in just hours to a few days: More than half (55%) of the potential exposure to fallout occurs in the first hour, and 80% occurs within the first day.
You'll need to shield yourself from the thermal and nuclear radiation, as you could die if exposed. However, you must find somewhere safe – you don't want to be crushed in a building destroyed by the blast wave. Get indoors, and preferably into a reinforced bunker or basement.
Stay away from windows, doors and any external walls. A basement or cellar will offer the best protection from nuclear disaster, though anywhere inside is better than outside. Avoid staying in your vehicle as they offer little protection against a blast or from fallout.
Move to a shelter, basement, or other underground area, preferably located away from the direction that the wind is blowing. Remove clothing since it may be contaminated; if possible, take a shower, wash your hair, and change clothes before you enter the shelter.
Scientists warn that ripple effects of a nuclear war could be devastating for everyone on Earth. “The combined cooling and enhanced UV would put significant pressures on global food supplies and could trigger a global nuclear famine,” said the authors of the 2014 report.
Can you Survive A Nuclear Bomb by sheltering in a Basement. Yes and no. Surviving a direct hit from a nuclear strike is unlikely; however, the actual area of that damage is quite small, and it is highly likely that going into the basement will allow you to survive a nuclear bomb.
This Is How You Actually Survive a Nuclear Attack - YouTube
How do you survive nuclear radiation?
- Stay inside. Close and lock all windows and doors. Go to the basement or the middle of the building. ...
- If possible, turn off fans, air conditioners, and forced-air heating units that bring air in from the outside. Close fireplace dampers.
The initial radiation pulse from a 1 KT device could cause 50% mortality from radiation exposure, to individuals, without immediate medical intervention, within an approximate ½ mile (790 m) radius. This radius increases to approximately ¾ mile (1200m) for a 10 KT detonation.

But the vast majority of the human population would suffer extremely unpleasant deaths from burns, radiation and starvation, and human civilization would likely collapse entirely. Survivors would eke out a living on a devastated, barren planet.
To make your bedroom as nuclear-proof as possible, start by insulating your windows and doors with aluminum foil. Bricks and mattresses can also provide added protection against heat and radiation.
Iceland. Iceland is a small island country located in the North Atlantic Ocean. It has a population of just over 300,000 people and an area of 103,000 square kilometers. Iceland is one of the safest countries in case of nuclear war due to its isolation, lack of military, and geothermal energy.
Shielding: Barriers of lead, concrete, or water provide protection from penetrating gamma rays. Gamma rays can pass completely through the human body; as they pass through, they can cause damage to tissue and DNA.
Roughly 80% of all residual radiation was emitted within 24 hours. Research has indicated that 24 hours after the bombing the quantity of residual radiation a person would receive at the hypocenter would be 1/1000th of the quantity received immediately following the explosion.
With that being said, the most dangerous place to be in Chernobyl is anywhere near the reactor - that area will take at least 20,000 years to disperse as far as radiation breakdown.
At the city center near where the bomb exploded, only the skeletons of three concrete buildings were still standing. It was being said, he reported, that Hiroshima might remain uninhabitable for 75 years.
Even though most radiation treatments only target specific collections of cancer cells, the effects of radiation can easily spread to nearby cells. Most recover within a few weeks, but some injuries develop later or require a longer recovery process.